西安交通大学现代远程教育考试卷 课 程:fake news专业英语 专业班号 考试日期 年 月 日 姓 名 学号 期中 期末 一． 根据下面的英文解释，写出相应的英文词汇。（共10分，每空1分） 1. the standard measure of electrical power ____________ 2. an electric generator that produces alternating current __________美国西北大学 3. two pieces of wire were connected end to end ____________ 4. two pieces of wire were connected side by side ____________ 5. the standard unit of measurement for strength of an electrical current ____________ 6. a device ud to break or open an electric circuit or to divert current from one conductor to another ____________ 7. a device that generates light, heat, or therapeutic radiation ____________ 8. a material that insulates, especially a nonconductor of sound, heat, or electricity ____________ 9. of or relating to a system of numeration having 2 as its ba ____________ 10. the standard unit of electrical resistance ____________ 二. 根据电气工程专业基本知识，判断正误。（共10分，每空1分） 1. In alternating current an AC generator is ud to make electrons flow continuously in one direction. _____ 2. In North American 50Hz is adopted as standard frequency in electric power system. _____ 3. A computer’s microprocessor only understands high-level language. _____ 4. Instructions written in a high-level language must be translated into machine language in binary form before a computer can u them. _____ | ||||
5. In alternating current an AC generator is ud to make electrons flow continuously in one direction. _____ 6. In China alternating current is usually generated at 60Hz. _____ 7. The north pole of the armature is attracted to the south pole of the main field. The south pole of the armature is attracted to the north pole of the main field. _____ 8. When three capacitors connected in ries,. _____ 9. The commutator can change current direction in the conductor. _____ 10. Most computers are equipped with a keyboard as the primary output device. _____ 三. 基本词汇的英汉互译。（共15分，每题1.5分）油泵柱塞 1. ____________ rated armature current 2. 理想电源 ____________ 3. ____________ circuit parameters 4. 周期电流 ____________ 5. ____________ negative feedback 6. 直轴 ____________ 7. 有功电流分量 ____________ 8. ____________ reactive current current 9. 电网 ____________ 10. ____________ digital relays 四. 根据电气工程基本知识，完成填空。（共30分，每空1分） 1. Resistors are _____ elements. A. passive B. active C. independent sources D. dependent sources 2. An electric heater draws 10 A from a 120V line. The resistance of the heater is _____. A. 1200Ω B. 120Ω C. 12Ω英语词典在线翻译 D. 1.2Ω 3. The algebraic sum of all voltages around a loop is _____. A. zero B. indefinite value C. sum of voltage ris D. sum of voltage drops 4. ON-OFF information can be reprented by _____ signal. A. a digital B. an analog C. a discrete D. a control | 英语教学案例
5. In North American _____ is adopted as standard frequency in electric power system. A. 25Hz B. 50Hz C. 60Hz D. 125Hz 6. _____ can provide an asynchronous link between two ac electric power system with different nominal frequencies. A. The HVDC (high voltage DC) transmission B. The EHV (extra-high voltage) AC transmission C. The AC distribution D. Generators 7. The generator voltages are usually stepped up to the transmission voltage level by _____. A. ries capacitor B. parallel reactors C. step-up transformers D. step-down transformers 8. A D/A is a device that can convert a digital signal to the equivalent _____. A. digital form B. numerical form C. binary form D. analog form 9. The precision of ADC ( analog-to-digital conversion ) is determined by _____. A. its speed B. its gain C. the accuracy of the reference voltage D. the number of binary bits 10. When an induction motor with 10 poles is supplied by 50Hz three-pha ac power source, the synchronous revolutions per minute is _____. (Synchronous r/min = 120 f/p) A. 1000 B. 900 C. 700 D. 600 11. A computer printer is _____ device that produces computer-generated text or graphical images on paper. A. an input B. an output C. a storage D. a data processing 12. _____ carries data out to speakers and headphones, or back from a microphone. A. A graphics card B. A modem C. A network card D. A sound card 13. A computer’s microprocessor only understands _____ in binary form. A. high-level languages B. machine language C. human languages D. asmbly language |
14. Delphi belongs to _____. A. low-level programming language B. high-level programming language C. a programming language connected with the computer hardware behavior D. an asmbly language 15. A floppy disk drive is _____ device that reads data from and writes data to floppy disks. A. an input B. an output C. a storage D. a data processing 关注英语16. In a coal-fired power plant, an electrostatic precipitator is ud to remove _____ from the combustion gas. A. solid particle B. C. CO D. water vapour 17. In cogeneration（热电联产，热电联供） systems, the overall energy efficiencies are raid by _____. A. important the combustion process B. providing thermal energy to the customers C. raising the steam temperature D. reducing emissions 18. The hydropower is well suited for switching according to _____ command to meet changing power needs. A. a consumer’s B. a ur’s C. a dispatcher’s D. an operator’s 19. The total transfer function for and in cascade is _____. A. B. C. D. 安静的英文 20. The system’s characteristic equation can be ud to determine _____ of a linear time-invariant system. A. the stability B. magnitude of the steady-state error C. the controllability D. the obrvability 21. The Buck（降压式变换器） is a _____ converter. A. voltage step-up B. current step-down C. current step-up D. resistance 22. A frequency respon is a function of the variable _____. A. B. C. D. |
23. The unit of logarithm of the magnitude of a transfer function is _____. A. radians per cond B. volts C. decibel D. octaves 24. The DC-DC converts _____ input to _____ output. A. direct current, alternating current B. direct current, direct current C. alternating current, alternating current D. alternating current, alternating current 25. The primary winding is connected to _____. A. the power source B. the load C. the measurement instrument D. the motor 26. Copper loss are _____ loss in the primary and condary windings of the transformer core. A. inductive B. capacitive C. resistive D. reactive 27. The relation results in _____. A. null B. identity C. indefinite value D. zero 28. The notebook computers u _____ as standard display equipment. A. CRT display B. LCDs C. LED D. TV screen 29. An expansion slot is a long, narrow socket on the motherboard into which you can plug _____. A. an expansion card B. a modem C. a network card D. a sound card 30. The transformer is a straightforward application of Faraday’s ______ Law. A. Ohm’s B. Electromagnetic Induction C. Kirchhoff’s Current D. Kirchhoff’s Voltage 五. 将下列短文翻译为中文。（共20分，第1题12分，第2题8分） grandparents1. The coil to which the voltage is applied is known as the primary, while the one from which the induced voltage is obtained is known as the condary. If the condary has more turns than the primary, the transformer is called a step-up transformer in which the AC voltage of the condary winding is higher than that applied to the primary winding. |
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